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	<head>
		<title>three.js webgpu - projector light</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="example.css">
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org/" target="_blank" rel="noopener" class="logo-link"></a>

			<div class="title-wrapper">
				<a href="https://threejs.org/" target="_blank" rel="noopener">three.js</a><span>Projector Light</span>
			</div>

			<small>
				Projector light with procedural caustics, video and texture projection.
			</small>
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.webgpu.js",
					"three/webgpu": "../build/three.webgpu.js",
					"three/tsl": "../build/three.tsl.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<video id="video" loop muted crossOrigin="anonymous" playsinline style="display:none">
			<source src="textures/sintel.ogv" type='video/ogg; codecs="theora, vorbis"'>
			<source src="textures/sintel.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'>
		</video>

		<script type="module">

			import * as THREE from 'three/webgpu';
			import { Fn, color, mx_worley_noise_float, time } from 'three/tsl';

			import { Inspector } from 'three/addons/inspector/Inspector.js';

			import { PLYLoader } from 'three/addons/loaders/PLYLoader.js';
			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

			let renderer, scene, camera;

			let projectorLight, lightHelper;

			init();

			function init() {

				// Renderer

				renderer = new THREE.WebGPURenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				renderer.inspector = new Inspector();
				document.body.appendChild( renderer.domElement );

				renderer.shadowMap.enabled = true;
				renderer.shadowMap.type = THREE.PCFSoftShadowMap;

				renderer.toneMapping = THREE.ACESFilmicToneMapping;
				renderer.toneMappingExposure = 1;

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 0.1, 100 );
				camera.position.set( 7, 4, 1 );

				// Controls

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.minDistance = 2;
				controls.maxDistance = 10;
				controls.maxPolarAngle = Math.PI / 2;
				controls.target.set( 0, 1, 0 );
				controls.update();

				// Textures

				const loader = new THREE.TextureLoader().setPath( 'textures/' );

				// Lights

				const causticEffect = Fn( ( [ projectorUV ] ) => {

					const waterLayer0 = mx_worley_noise_float( projectorUV.mul( 10 ).add( time ) );

					const caustic = waterLayer0.mul( color( 0x5abcd8 ) ).mul( 2 );

					return caustic;

				} );


				const ambient = new THREE.HemisphereLight( 0xffffff, 0x8d8d8d, 0.15 );
				scene.add( ambient );

				projectorLight = new THREE.ProjectorLight( 0xffffff, 100 );
				projectorLight.colorNode = causticEffect;
				projectorLight.position.set( 2.5, 5, 2.5 );
				projectorLight.angle = Math.PI / 6;
				projectorLight.penumbra = 1;
				projectorLight.decay = 2;
				projectorLight.distance = 0;

				projectorLight.castShadow = true;
				projectorLight.shadow.mapSize.width = 1024;
				projectorLight.shadow.mapSize.height = 1024;
				projectorLight.shadow.camera.near = 1;
				projectorLight.shadow.camera.far = 10;
				projectorLight.shadow.focus = 1;
				projectorLight.shadow.bias = - .003;
				scene.add( projectorLight );

				lightHelper = new THREE.SpotLightHelper( projectorLight );
				scene.add( lightHelper );

				//

				const geometry = new THREE.PlaneGeometry( 200, 200 );
				const material = new THREE.MeshLambertMaterial( { color: 0xbcbcbc } );

				const mesh = new THREE.Mesh( geometry, material );
				mesh.position.set( 0, - 1, 0 );
				mesh.rotation.x = - Math.PI / 2;
				mesh.receiveShadow = true;
				scene.add( mesh );

				// Models

				new PLYLoader().load( 'models/ply/binary/Lucy100k.ply', function ( geometry ) {

					geometry.scale( 0.0024, 0.0024, 0.0024 );
					geometry.computeVertexNormals();

					const material = new THREE.MeshLambertMaterial();

					const mesh = new THREE.Mesh( geometry, material );
					mesh.rotation.y = - Math.PI / 2;
					mesh.position.y = 0.8;
					mesh.castShadow = true;
					mesh.receiveShadow = true;
					scene.add( mesh );

				} );

				window.addEventListener( 'resize', onWindowResize );

				// GUI

				const gui = renderer.inspector.createParameters( 'Projector Light' );

				const params = {
					type: 'procedural',
					color: projectorLight.color.getHex(),
					intensity: projectorLight.intensity,
					distance: projectorLight.distance,
					angle: projectorLight.angle,
					penumbra: projectorLight.penumbra,
					decay: projectorLight.decay,
					focus: projectorLight.shadow.focus,
					shadows: true,
				};

				let videoTexture, mapTexture;

				gui.add( params, 'type', [ 'procedural', 'video', 'texture' ] ).onChange( function ( val ) {

					projectorLight.colorNode = null;
					projectorLight.map = null;

					if ( val === 'procedural' ) {

						projectorLight.colorNode = causticEffect;

						focus.setValue( 1 );

					} else if ( val === 'video' ) {

						if ( videoTexture === undefined ) {

							const video = document.getElementById( 'video' );
							video.play();

							videoTexture = new THREE.VideoTexture( video );
							videoTexture.colorSpace = THREE.SRGBColorSpace;

						}

						projectorLight.map = videoTexture;

						focus.setValue( .46 );

					} else if ( val === 'texture' ) {

						mapTexture = loader.load( 'colors.png' );
						mapTexture.minFilter = THREE.LinearFilter;
						mapTexture.magFilter = THREE.LinearFilter;
						mapTexture.generateMipmaps = false;
						mapTexture.colorSpace = THREE.SRGBColorSpace;

						projectorLight.map = mapTexture;

						focus.setValue( 1 );

					}

				} );

				gui.addColor( params, 'color' ).onChange( function ( val ) {

					projectorLight.color.setHex( val );

				} );

				gui.add( params, 'intensity', 0, 500 ).onChange( function ( val ) {

					projectorLight.intensity = val;

				} );


				gui.add( params, 'distance', 0, 20 ).onChange( function ( val ) {

					projectorLight.distance = val;

				} );

				gui.add( params, 'angle', 0, Math.PI / 3 ).onChange( function ( val ) {

					projectorLight.angle = val;

				} );

				gui.add( params, 'penumbra', 0, 1 ).onChange( function ( val ) {

					projectorLight.penumbra = val;

				} );

				gui.add( params, 'decay', 1, 2 ).onChange( function ( val ) {

					projectorLight.decay = val;

				} );

				const focus = gui.add( params, 'focus', 0, 1 ).onChange( function ( val ) {

					projectorLight.shadow.focus = val;

				} );

				gui.add( params, 'shadows' ).onChange( function ( val ) {

					renderer.shadowMap.enabled = val;

					scene.traverse( function ( child ) {

						if ( child.material ) {

							child.material.needsUpdate = true;

						}

					} );

				} );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				const time = performance.now() / 3000;

				projectorLight.position.x = Math.cos( time ) * 2.5;
				projectorLight.position.z = Math.sin( time ) * 2.5;

				lightHelper.update();

				renderer.render( scene, camera );

			}

		</script>

	</body>

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